谁可以设置蓝色事故警示标志？

396. 谁可以设置蓝色事故警示标志？

单选题正确率: 91%

A. 急救人员 B. 一名警察 C. 市政人员 D. 公众成员

恭喜，答对了！ {{vm.result.explain}}

答案不正确！ {{vm.result.explain}}

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